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US 4,232,978 AGranted
Double locking device
AssigneeGrumman Aerospace Corporation
InventorMurray Cohen
Life of this patent
Estimating the term…
Abstract
In a coupling of members subject to rotational uncoupling forces a lock key that unites the members and holds them from relative rotational movement with a fastener for the lock key to not only secure the lock key to one or the other members but insure proper locking with the lock key of the members.
Claims10
Means to double lock a connection, said means comprising:
- a first part to be used in a connection, said first part having a longitudinal bore and a slot in its end face and a bore through its sidewall into said longitudinal bore;
- a second part to be inserted into and thereby joined with the first part in the longitudinal bore with means therein making the connection between the first part and the second part, said second part having a longitudinal groove;
- a lock key having a groove tab within said groove and a slot tab within said slot when interposed with said first part and said second part, said lock key further having a shelf that extends over said first part with a bore through the shelf that upon seating of the slot tab in the slot is aligned with the bore through the sidewall of said first part;
- a jamnut to hold said lock key such that the slot tab is in the slot and the bore of the shelf is aligned with the bore through the sidewall of said first part;
- and
- a dog screw with threads of a limited length and a reduced diameter dog extending beyond the threads, said dog screw being insertable through the bore of the shelf and threaded within the bore in the sidewall of said first part that lies under the shelf, said dog being projected into said groove to, with said lock key, prevent removal of said second part from said first part and thereby double lock the connection thereof.
3 more elements
Secured locking means for a connection of relatively rotatable members, said means including:
- one member having an end portion with a longitudinal groove in a surface thereof;
- another member to be connected to said one member, said another member having a tapped bore a predetermined distance from an end that has slots of a predetermined depth in its face which receives said one member;
- a lock key having a groove tab and at least one slot tab cooperating with the groove of the one member and the slots of the another member to prevent relative rotation thereof, said lock key carrying a dog screw to extend towards said tapped bore and be threaded thereinto to bottom in the groove of the one member thereunder when said slot tab is bottomed in the slot of the face of the another member;
- and
- means about the one member to hold the slot tabs in position while the dog screw is being threaded in the bore.
2 more elements
A positive locking device comprising:
- a male member having a threaded extension that is longitudinally grooved;
- a female member having a threaded bore to receive said male member, said female member having a face about said threaded bore that is provided with a plurality of slots of a predetermined depth and at least one tapped hole a predetermined distance back of said face open to said threaded bore;
- a lock key about said male member and oriented thereto by a groove tab depending from the lock key, said lock key having at least one slot tab of a pretermined extension to bottom in at least one slot in the face of the female member when the lock key is flush on the face, said lock key further having means to be aligned with said tapped hole when flush with the face as aforesaid;
- a dog screw adapted to be presented to said tapped hole by said means of said lock key, said dog screw having a dog of a predetermined length that will prevent threading into said tapped hole unless said male member has its groove under said hole and such as to bottom in the groove before binding on the male member of the lock key;
- and
- a jamnut to hold the lock key flush to the face of the female member.
3 more elements
Dependencies are inferred from the claim text.